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Math check

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A sample of 30 of 178 funded projects revealed that 12 were valued at $17,360 each and 18 were valued at $20,280 each. From the sample data, estimate the total value of the funding for all the projects. (Enter your answers to two decimal places.)
$ 35.60 was my answer

  • Math check -

    this is how I worked it 12+18=30, 12/30=.4, .4X178=71.2
    12+18=30, 18/30=.6, .6X178=106.8
    I first got 178.00 then I redone and got 35.60

  • Math check -

    Can someone tell me what I am doing wrong on this problem?

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